From: Jayachandran C <jayachandranc@netlogicmicro.com>
Date: Mon, 16 Jul 2012 10:03:37 +0000 (+0530)
Subject: MIPS: Netlogic: early console fix
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7e6507ad76a212b961d2392d22a9610be9e4e053;p=linux-beck.git

MIPS: Netlogic: early console fix

In prom_putchar(), wait for just the TX empty bit to clear in the
UART LSR.

Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Cc: Florian Fainelli <florian@openwrt.org>
Patchwork: https://patchwork.linux-mips.org/patch/4112/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/arch/mips/netlogic/common/earlycons.c b/arch/mips/netlogic/common/earlycons.c
index f193f7b3bd81..1902fa22d277 100644
--- a/arch/mips/netlogic/common/earlycons.c
+++ b/arch/mips/netlogic/common/earlycons.c
@@ -54,7 +54,7 @@ void prom_putchar(char c)
 #elif defined(CONFIG_CPU_XLR)
 	uartbase = nlm_mmio_base(NETLOGIC_IO_UART_0_OFFSET);
 #endif
-	while (nlm_read_reg(uartbase, UART_LSR) == 0)
+	while ((nlm_read_reg(uartbase, UART_LSR) & UART_LSR_THRE) == 0)
 		;
 	nlm_write_reg(uartbase, UART_TX, c);
 }